/*
 * Created on 12 Jun 2006
 * Created by Paul Gardner
 * Copyright (C) Azureus Software, Inc, All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 */

package com.aelitis.net.natpmp.upnp.impl;

import java.util.ArrayList;
import java.util.List;

import org.gudy.azureus2.core3.util.Debug;
import org.gudy.azureus2.core3.util.SimpleTimer;
import org.gudy.azureus2.core3.util.TimerEvent;
import org.gudy.azureus2.core3.util.TimerEventPerformer;

import com.aelitis.net.natpmp.NatPMPDevice;
import com.aelitis.net.natpmp.upnp.NatPMPUPnP;
import com.aelitis.net.upnp.UPnP;
import com.aelitis.net.upnp.UPnPListener;

public class NatPMPUPnPImpl implements NatPMPUPnP {
    private UPnP upnp;
    private NatPMPDevice nat_device;

    private NatPMPUPnPRootDeviceImpl root_device;

    private List listeners = new ArrayList();

    private boolean enabled = true;

    private boolean started;

    public NatPMPUPnPImpl(UPnP _upnp, NatPMPDevice _nat_device) {
        upnp = _upnp;
        nat_device = _nat_device;
    }

    protected void start() {
        SimpleTimer.addPeriodicEvent("NATPMP:search", 60 * 1000, new TimerEventPerformer() {
            public void perform(TimerEvent event) {
                search();
            }
        });

        search();
    }

    public void setEnabled(boolean _enabled) {
        enabled = _enabled;
    }

    public boolean isEnabled() {
        return (enabled);
    }

    protected void search() {
        if (!enabled) {

            return;
        }

        if (root_device != null) {

            return;
        }

        try {
            boolean found = nat_device.connect();

            if (found) {

                root_device = new NatPMPUPnPRootDeviceImpl(upnp, nat_device);

                for (int i = 0; i < listeners.size(); i++) {

                    try {
                        ((UPnPListener) listeners.get(i)).rootDeviceFound(root_device);

                    } catch (Throwable e) {

                        Debug.printStackTrace(e);
                    }
                }
            }
        } catch (Throwable e) {

            Debug.printStackTrace(e);
        }
    }

    public synchronized void addListener(UPnPListener listener) {
        listeners.add(listener);

        if (root_device == null) {

            if (listeners.size() == 1 && !started) {

                started = true;

                start();
            }
        } else {

            listener.rootDeviceFound(root_device);
        }
    }

    public synchronized void removeListener(UPnPListener listener) {
        listeners.remove(listener);
    }
}
